from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, BooleanField, SubmitField
from wtforms.validators import DataRequired, Length, Email, Regexp, EqualTo
from wtforms import ValidationError
from ..models import User

class LoginForm(FlaskForm):
	email = StringField('Email', validators=[DataRequired(), Length(1, 64), Email()])
	password = PasswordField('Password', validators=[DataRequired()])
	remember_me = BooleanField('Keep me logged in')
	submit = SubmitField('Login In')


class RegistrationForm(FlaskForm):
	email = StringField('Email', validators=[DataRequired(), Length(1, 64), Email()])
	username = StringField('Username', validators=[DataRequired(), Length(1, 64),
				Regexp('^[A-Za-z][A-Za-z0-9_.]*$', 0,
					'Usernames must have only letters, numbers, dots or '
					'underscores')])
	password = PasswordField('Password', validators=[DataRequired(),
				EqualTo('password2', message='Passwords must match.')])
	password2 = PasswordField('Confirm password', validators=[DataRequired()])
	submit = SubmitField('Register')

	def validate_email(self, field):
		if User.query.filter_by(email=field.data).first():
			raise ValidationError('邮箱被注册过了')

	def validate_username(self, field):
		if User.query.filter_by(username=field.data).first():
			raise ValidationError('用户名被使用')

class ChangePasswordForm(FlaskForm):
    old_password = PasswordField('Old password', validators=[DataRequired()])
    password = PasswordField('New password', validators=[
        DataRequired(), EqualTo('password2', message='Passwords must match.')])
    password2 = PasswordField('Confirm new password',
                              validators=[DataRequired()])
    submit = SubmitField('Update Password')


class PasswordResetRequestForm(FlaskForm):
	email = StringField('Email', validators=[DataRequired(), Length(1, 64),
	                                         Email()])
	submit = SubmitField('Reset Password')
class PasswordResetForm(FlaskForm):
	password = PasswordField('New Password', validators=[
	    DataRequired(), EqualTo('password2', message='Passwords must match')])
	password2 = PasswordField('Confirm password', validators=[DataRequired()])
	submit = SubmitField('Reset Password')


class ChangeEmailForm(FlaskForm):
    email = StringField('New Email', validators=[DataRequired(), Length(1, 64),
                                                 Email()])
    password = PasswordField('Password', validators=[DataRequired()])
    submit = SubmitField('Update Email Address')

    def validate_email(self, field):
    	if User.query.filter_by(email=field.data).first():
    		raise ValidationError('Email already registered.')

